Reversal of trend of biomass burning in the Amazon

被引：53

作者：

Koren, Ilan ^{[1
]}

Remer, Lorraine A.

Longo, Karla

机构：

[1] Weizmann Inst Sci, Dept Environm Sci, IL-76100 Rehovot, Israel

[2] Inst Nacl Pesquisas Espaciais, Ctr Weather Forecasting & Climate Studies, BR-12227010 Cachoeira Paulista, SP, Brazil

[3] Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2007年 / 34卷 / 20期

关键词：

D O I：

10.1029/2007GL031530

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We use MODIS aerosol optical depth and AVHRR fire counts over the Amazon Basin to determine whether biomass burning is increasing or decreasing over continental scales in South America. We find a significant sustained increasing trend in both the seasonal mean optical depth and fire data that begins in the year 2000 and 1998, respectively, and continues through 2005. However, there is a sharp reversal of this trend in 2006 that causes the overall trend to become less significant. The sharp decrease of biomass burning in 2006 is linked to a tri-national policy shift first implemented in 2006. The results show how significantly human activity can affect the large scale environment.

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